One verse

Srimad Bhagavatam 1.4.10

1.4.10

स सम्राट् कस्य वा हेतो: पाण्डूनां मानवर्धन: । प्रायोपविष्टो गङ्गायामनाद‍ृत्याधिराट्‌श्रियम् ॥ १० ॥

sa samrat kasya va hetoh pandunam mana-vardhanah prayopavisto gangayam anadrtyadhirat-sriyam

sah
he
samrat
the Emperor
kasya
for what
va
or
hetoh
reason
pandunam
of the sons of Pandu
mana-vardhanah
one who enriches the family
praya-upavistah
sitting and fasting
gangayam
on the bank of the Ganges
anadrtya
neglecting
adhirat
acquired kingdom
sriyam
opulences.

He was a great emperor and possessed all the opulences of his acquired kingdom. He was so exalted that he was increasing the prestige of the Pandu dynasty. Why did he give up everything to sit down on the bank of the Ganges and fast until death?